espero que nao presisse mudar.

lib/utils/session_manager.dart

@@ -0,0 +1,20 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class SessionManager {
+  static const _key = 'session_in_progress';
+
+  static Future<void> setInProgress(bool v) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_key, v);
+  }
+
+  static Future<bool> isInProgress() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getBool(_key) ?? false;
+  }
+
+  static Future<void> clear() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove(_key);
+  }
+}